Micromorfologia de pelos aristiformes de roedores das Famílias Cricetidae e Echimyidae (Mammalia, Rodentia)

• Autor(a) principal: Duarte, Tarcísio de Souza
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/2274
• topic: Rodentia; Echimyidae; Cricetidae; Morfologia; Pelos; Tricologia; Rodentia; Echimyidae; Cricetidae; Morphology; Hairs; Trichology; CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA

The part of the science that studies the hair is the tricology, which when applied to identifying micromorfological patterns of them, is named tricotaxonomy. This technique has been widely used in mastozoological applied studies that required species identification, as inventory of fauna, feeding ecology, forenistical analyses, amog others. Aristiform hairs are typical of rodents of Echimyidae, Cricetidae, Heteromyidae e Erethizontidae families and are different from the thorns because they are smaller and less rigid, not playing the role of protection of predators. This kind of hair is understudied, limited to a few studies under scanning electron microscopy. This papper identified the micromorphological patterns of 16 species of spiny rats of the families Echimyidae and Cricetidae under light microscopy. Preparations were made for viewing of cuticle and medulla of the hairs using the well known tchniques by the most of current researchers. The results showed that are no significant differences among the hairs of differents parts of the animals body. Moreover, it was seen that the medullar morphology and the cross sections of the hairs are uninformative in taxonomic terms, because they occurred equally in all species. The cuticullar morphology was more significant and may be different among the species. From this, we constructed a dichotomous key to identification of the studied species. In conclusion, the tricological studies are incipiet for certain groups and, this technique can be applied in taxonomic studies by combining the efficiency results with practicality and speed in performing the analyzes as an adjunct to traditional identification or as a main tool (in the case samples without provenance).